Modular drill bit assembly and walking down-the-hole drill rig

Abstract

The present invention discloses a modular drill bit assembly and a down-the-hole drill rig. The modular drill bit assembly includes a mounting frame, a rotating outer tube, and an eccentric column. The mounting frame has a U-shaped mounting opening. A lifting trolley with a rotary drive assembly is provided at the mounting opening. A rotatable rotating outer tube is provided in the mounting opening, and a clamping claw is slidably provided on the rotating outer tube. A fixed eccentric column is provided in the rotating outer tube. When the rotating outer tube rotates, the protrusion of the eccentric column squeezes the clamping claw so that the clamping claw extends below the rotary drive assembly. The lifting trolley descends, and the rotary drive assembly rotates to thread the extension rod, the rotary drive assembly, and the drill rod. The present application realizes the modularization of the extension rod and the drill rod. The drill rod and the extension rod are set in the clamping claw and stored in the mounting opening when not in use. When in use, the extension rod or the drill bit is ejected by rotating a certain angle, and then screwed in by the lifting trolley descending and the rotary drive assembly rotating at the same time, thereby realizing automatic installation. During use, there is no need for manual pole erection, which saves time and labor and greatly improves safety.

Description

Technical Field

[0001] The invention relates to a down-the-hole drill and a drill bit assembly thereof, in particular to a modular drill bit assembly and a walking down-the-hole drill. Background Art

[0002] A down-the-hole drill is a type of drilling rig used for excavation work in mines and distribution network foundation pits. It is suitable for digging holes in medium-hard or above rock conditions. It can compress the working time of 3 days of manual labor to less than 2 hours, effectively improving work efficiency.

[0003] The patent application number CN2018207878218 discloses a down-the-hole drill rig, which relates to the field of drilling equipment, including a down-the-hole drill rig body and a drill rod arranged on the down-the-hole drill rig body. In addition, it can be seen from its accompanying drawings that its drill bit assembly - the drill rod has only one, and during use, the drill rod will gradually decrease with the drilling depth.

[0004] After the top of the drill rod drops to a certain level, drilling can no longer continue and an extension rod needs to be added. However, the drill rod installation structure in the above patent does not have a structure for carrying and adding drill rods. Therefore, it is necessary to manually erect the extension rod and put it on the top of the drill rod and then fix it. During this process, if the weight of the extension rod is large, it is difficult to erect the extension rod manually and there is a certain safety risk. Summary of the Invention

[0005] In the prior art, a drill rod only includes one piece. When an extension rod is needed after the drill rod is drilled into the ground, it needs to be added manually. However, manual addition is difficult to operate and has safety risks. The present invention provides a modular drill bit assembly and a walking down-the-hole drill rig.

[0006] The technical solution adopted by the present invention to solve the above technical problems is:

[0007] Modular drill head assembly, including:

[0008] A drill rod having a cutter head at its bottom end and an upper connecting structure at its top end, the upper connecting structure being used to connect to a rotary drive assembly on an extension rod or a lifting trolley;

[0009] The extension rod has the same diameter as the drill rod, a lower connecting structure is provided at the bottom end thereof, and an upper connecting structure is provided at the top end thereof, and the lower connecting structure and the upper connecting structure are detachably connected;

[0010] The mounting frame has a U-shaped mounting opening, and the top and bottom of the mounting opening are provided with mounting seat plates, and one or both sides of the mounting opening are provided with a lifting rack;

[0011] A lifting trolley is slidably mounted at the end of the mounting opening of the mounting frame, and includes a lifting gear meshing with a rack and a lifting motor driving the lifting gear to rotate. The lifting rack and the lifting gear may be arranged on one side or both sides of the two inner side walls of the mounting opening, or may be arranged in a clamping structure on one inner side wall and one outer side wall, or on two inner side walls and two outer side walls, that is, two racks and two lifting gears respectively meshing with the two racks are provided, thereby significantly improving its load-bearing capacity.

[0012] A rotating outer tube is rotatably mounted on two mounting base plates and is located within the mounting opening. The mounting base plates are provided with a first driving mechanism that drives the rotating outer tube to rotate.

[0013] An eccentric column is fixed to the mounting base plate and is located inside the rotating outer tube. The eccentric column has a vertically extending protrusion, and the rotating outer tube can rotate relative to the eccentric column. When the rotating outer tube rotates, the protrusion squeezes the clamping claw so that the clamping claw extends from the mounting opening to below the lifting trolley.

[0014] The clamping jaws slide horizontally through and are resettably mounted on the rotating outer tube. The clamping jaws have a U-shaped electromagnetic jaw with a clamping opening. The width of the clamping opening of the electromagnetic jaws is the same as the diameter of the drill rod and the extension rod. When energized, the electromagnetic jaws can absorb the drill rod or the extension rod at the clamping opening. When the electromagnetic jaws rotate with the rotating outer tube, the inner ends of the electromagnetic jaws are squeezed by the raised portions and slide outward, thereby ejecting the absorbed drill rod or extension rod to the docking position.

[0015] The rotary drive assembly is arranged on the lifting trolley, and an upper connecting structure is provided at its output end. When the drill rod or extension rod is extended, it follows the lifting trolley to descend and the drill rod or extension rod is sleeved and docked. It is used to provide power for the drill rod to drill into, and it also provides power for screwing in and connecting with the top of the drill rod or the top of the extension rod.

[0016] Preferably, the clamp includes a non-circular sliding rod and an electromagnetic claw arranged at the outer end of the sliding rod. The inner end of the sliding rod has a limit head to prevent it from falling off the rotating outer tube. The outer side wall of the rotating outer tube is provided with a support frame, and the sliding rod slides through the support frame. The support frame and the sliding rod are provided with a reset structure for retracting and restoring the sliding rod.

[0017] Preferably, the reset structure includes a stopper provided on the sliding rod and a reset spring sleeved on the sliding rod. One end of the reset spring abuts the stopper, while the other end abuts the mounting bracket. When the sliding rod slides out, the reset spring is compressed. The reset spring is used to reset the sliding rod after it is extruded, causing the clamping jaws to retract in preparation for the next rotation of the outer tube, thereby preventing interference between the sliding rod and the mounting bracket as it rotates.

[0018] Preferably, the clamping jaws include a plurality of clamping jaw groups distributed in a circular array on the rotating outer tube, each clamping jaw group including at least two vertically arranged clamping jaws. The plurality of clamping jaws in the vertically arranged clamping jaw group are used to jointly grasp the extension rod, thereby increasing the stability after grasping.

[0019] Preferably, the jaws are provided with four, and the rotation angle between two adjacent jaws is 90 degrees. Wherein, when the rotating outer tube rotates in the same direction, clockwise or counterclockwise, one jaw is extended for each 90-degree rotation, and an extension rod can be installed on each jaw.

[0020] Preferably, the first driving mechanism includes a driving motor and an outer gear ring arranged on the rotating outer tube. A driving gear is provided on the motor shaft of the driving motor, and the driving gear is engaged with the outer gear ring. An angle sensor engaged with the driving gear is also provided on the mounting base plate. The rotation angle of the driving gear is obtained by the angle sensor and used to control the rotation angle of the rotating outer tube.

[0021] Preferably, the upper connecting structure is a step structure, the outer side wall of the step structure is provided with an external thread, and the lower connecting structure is a sleeve structure, the inner side wall of the sleeve structure is provided with an internal thread that matches the external thread. The rotary drive assembly is lifted and lowered to press the drill rod or extension rod down to dock and connect them by rotation.

[0022] Preferably, a retaining seat is provided at the bottom of the mounting seat plate, the bottom of which has several conical heads, and a retaining frame is provided on the side, and the retaining frame is provided with a retaining mouth with a limiting opening. The drill rod and the extension rod are located in the retaining mouth and their inclination angles are kept within the set range by limiting the retaining mouth.

[0023] The walking down-the-hole drill comprises a walking support mechanism, on which a turning mechanism is provided. The turning mechanism comprises:

[0024] A swing frame, which is rotatably mounted on the walking support mechanism;

[0025] a first articulated frame, which is hinged to the swing frame;

[0026] a flip seat hinged to an end of the first hinged frame;

[0027] A first telescopic cylinder, with both ends hinged to the walking support mechanism and the first articulated frame respectively, for driving the first articulated frame to swing;

[0028] The second telescopic cylinder has two ends hinged to the swing frame and the first articulated frame respectively for driving the first articulated frame to rotate up and down;

[0029] The third telescopic cylinder has two ends hinged to the first hinge frame and the turning seat respectively, and is used to drive the turning seat to turn up and down;

[0030] The rotating disk has two relatively rotatable connecting ends, one of which is fixed to the turning seat and has two symmetrical fourth telescopic cylinders hinged on both sides of the connecting end;

[0031] A fixed frame, one side of which is fixed to the other connecting end of the rotating disk, is hingedly connected to the output end of the fourth telescopic cylinder so as to be driven by the two fourth telescopic cylinders to rotate around the rotating disk, and the other side of which is fixed to the above-mentioned modular drill assembly, wherein the mounting frame of the modular drill assembly is detachably connected to the fixed frame;

[0032] Taking the walking part of the walking support mechanism being in a horizontal state as a reference, the swing frame rotates in the horizontal direction, and the first articulated frame and the turnover seat rotate in the vertical direction.

[0033] Preferably, the walking support mechanism includes a machine body and a crawler-type walking mechanism for driving the machine body to walk, and the machine body is provided with a plurality of vertically retractable hydraulic support legs.

[0034] Compared with the prior art, the advantages of the present invention are: the present application realizes the modularization of the extension rod and the drill rod, and the drill rod and the extension rod are set in the clamp and stored in the installation opening when not in use. When in use, the extension rod or the drill bit is pushed out by rotating a certain angle, and then the lifting trolley is lowered and the rotary drive assembly is rotated to screw it in, realizing automatic installation. During use, there is no need for manual pole erection, which saves time and effort and greatly improves safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The present invention will be described in further detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will appreciate that these drawings are drawn only for the purpose of explaining the preferred embodiments and should not be construed as limiting the scope of the present invention. Furthermore, unless otherwise specified, the drawings are merely schematic representations of the composition or structure of the depicted objects and may contain exaggerated representations. Furthermore, the drawings are not necessarily drawn to scale.

[0036] Figure 1 A perspective view of the down-the-hole drilling rig in this application;

[0037] Figure 2 A perspective view of the down-the-hole drilling rig in this application;

[0038] Figure 3 A perspective view of the down-the-hole drilling rig in this application;

[0039] Figure 4 A perspective view of the drill bit assembly in this application;

[0040] Figure 5 An exploded view of the drill bit assembly in this application;

[0041] Figure 6A perspective view of the rotating outer tube in this application;

[0042] Figure 7 for Figure 6 Enlarged view of point C in the middle;

[0043] Figure 8 A cross-sectional view of the drill bit assembly showing the jaws;

[0044] Figure 9 for Figure 2 Enlarged view of point A in the middle;

[0045] Figure 10 for Figure 3 Enlarged view of point B in the middle;

[0046] Figure 11 A three-dimensional diagram of the entire drilling rig with a dust removal and noise reduction structure;

[0047] Figure 12 is a perspective view of a drill bit assembly;

[0048] Figure 13 It is a three-dimensional diagram of the limit seat;

[0049] Figure 14 A perspective view of the dust removal and noise reduction structure (top);

[0050] Figure 15 A three-dimensional diagram of the dust removal and noise reduction structure (bottom);

[0051] Figure 16 Exploded view of the dust removal and noise reduction structure;

[0052] In the figure: 01, machine body; 011, support leg; 02, crawler walking mechanism; 03, flip mechanism; 031, swing frame; 032, first articulated frame; 033, second telescopic cylinder; 034, third telescopic cylinder; 035, first telescopic cylinder; 036, flip seat; 037, rotating disk; 038, fourth telescopic cylinder; 039, fixed frame; 04, drill assembly; 041, mounting frame; 0411, mounting opening; 042, rotating outer tube; 0421, supporting frame; 043, lifting trolley; 0431, rack; 044, mounting base; 045, clamping claw; 0451, sliding rod; 04511, limit head; 0452, electromagnetic claw; 0453, return spring; 0454, limit platform; 046, holding seat; 047, tapered head; 048, holding frame; 04811, mounting column; 04812, water outlet joint; 049, eccentric column; 0491, raised portion; 003, dust removal and noise reduction structure; 0031, second cover; 00311, second hinged ear; 0032, first cover; 00321, first hinged ear; 0033, inner top plate; 0034, arc-shaped hole; 0035, nozzle; 0036, locking nut; 0037, inner cylinder; 00371, arc-shaped plate; 0038, outer cylinder; 0039, mounting plate. DETAILED DESCRIPTION

[0053] Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are only illustrative and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0054] It should be noted that like reference numerals denote like items in the following drawings, and thus, once an item is defined in one drawing, it may not be further defined or explained in subsequent drawings. Example

[0055] This embodiment mainly describes the title of the modular drill bit assembly, which is as follows:

[0056] This embodiment provides a modular drill bit assembly. Figure 4-Figure 8 , which includes:

[0057] A drill rod having a cutter head at its bottom end and an upper connecting structure at its top end, the upper connecting structure being used to connect to the rotary drive assembly on the extension rod or the lifting trolley 043;

[0058] The extension rod has the same diameter as the drill rod, a lower connecting structure is provided at the bottom end thereof, and an upper connecting structure is provided at the top end thereof, and the lower connecting structure and the upper connecting structure are detachably connected;

[0059] The mounting frame 041 has a U-shaped mounting opening 0411 with mounting base plates 044 at the top and bottom of the mounting opening 0411, and a lifting rack 0431 at one or both sides of the mounting opening 0411;

[0060] The lifting trolley 043 is slidably mounted at the end of the mounting opening 0411 of the mounting frame 041 and includes a lifting gear meshing with a rack 0431 and a lifting motor for driving the lifting gear. The lifting rack 0431 and the lifting gear may be disposed on one or both sides of the two inner side walls of the mounting opening 0411, or may be configured as a clamping structure on one inner side wall and one outer side wall, or on two inner side walls and two outer side walls, i.e., two racks 0431 and two lifting gears respectively meshing with the two racks 0431 are disposed. This significantly increases the load-bearing capacity of the trolley.

[0061] The rotating outer tube 042 is rotatably mounted on two mounting base plates 044 and is located within the mounting opening 0411. The mounting base plates 044 are provided with a first driving mechanism that drives the rotating outer tube 042 to rotate. Specifically, two bearings are sleeved on the rotating outer tube 042, and two seats are provided that are interference-fit with the bearings and are rotatably connected to the upper and lower mounting base plates 044. In addition, the eccentric column 049 has a cylindrical section at the top and bottom, which passes through the two seats and is fixed to one or both mounting base plates 044 via a flange.

[0062] The eccentric column 049 is fixed to the mounting base plate 044 and is located inside the rotating outer tube 042. It has a vertically extending protrusion 0491, and the rotating outer tube 042 can rotate relative to it. When the rotating outer tube 042 rotates, the protrusion 0491 squeezes the clamping jaw 045 so that the clamping jaw 045 extends from the mounting opening 0411 to the bottom of the lifting trolley. The protrusion 0491 can be provided as an integral structure extending along the length direction or as a plurality of separate protrusions 0491. When provided as a plurality of separate protrusions 0491, each protrusion acts on the clamping jaw 045 at the same height to push the clamping jaw 045 out. In addition, the cylindrical section of the eccentric column 049 can be installed with a bearing to provide support between the eccentric column 049 and the rotating outer tube 042.

[0063] The clamping jaw 045 slides horizontally through and is repositioned on the rotating outer tube 042. It has a U-shaped electromagnetic jaw 0452 with a clamping opening. The width of the clamping opening of the electromagnetic jaw 0452 is the same as the diameter of the drill rod and extension rod. When energized, the electromagnetic jaw 0452 can capture the drill rod or extension rod at the clamping opening. As the rotating outer tube 042 rotates, the inner end of the electromagnetic jaw 0452 is squeezed by the raised portion 0491, causing it to slide outward and eject the captured drill rod or extension rod to the docking position.

[0064] The rotary drive assembly, mounted on the lifting trolley 043, features an upper connecting structure at its output end. When the drill rod or extension rod is extended, the rotary drive assembly follows the lowering of the lifting trolley 043 and engages the drill rod or extension rod, providing the driving force for drilling the drill rod and also providing the driving force for screwing it into the top of the drill rod or extension rod. In actual use, a horizontal pin hole and a stop pin are added at the connection point to allow the drill rod to be reversed and removed after drilling is complete. The power of the rotary drive assembly can be provided by a rotary motor. When the lifting trolley 043 descends, the rotary motor drives the upper connecting structure to rotate, thereby tightening the rotary drive assembly, the extension rod, and the drill rod. During the tightening process, the magnetism of the clamp gradually decreases through the control of voltage and current. The feedback signal is realized by detecting the descending height of the lifting trolley 043, that is, within the time of 0-t1, the magnetic force of the clamp is kept at a maximum, and within the time of t1-t2, the magnetic force is controlled from maximum to 0, where t1 is the time point when the lifting trolley 043 descends from its original position to the time point when the thread just abuts, and t2 is the time point when the thread structure is fully screwed in. The descending height of the lifting trolley 043 is measured by setting an angle sensor to measure the angle of rotation of the gear meshing with the rack, and the control is achieved by setting a controller.

[0065] Preferably, the clamp 045 includes a non-circular sliding rod 0451 and an electromagnetic claw 0452 arranged at the outer end of the sliding rod 0451. The inner end of the sliding rod 0451 has a limit head 04511 to prevent it from falling off the rotating outer tube 042. The outer side wall of the rotating outer tube 042 is provided with a support frame 0421. The sliding rod 0451 slides through the support frame 0421. The support frame 0421 and the sliding rod 0451 are provided with a reset structure for the sliding rod 0451 to retract and return to its original position.

[0066] Preferably, the reset structure includes a stopper 0454 provided on the sliding rod 0451 and a reset spring 0453 sleeved on the sliding rod 0451. One end of the reset spring 0453 abuts against the stopper 0454, while the other end abuts against the mounting bracket 041. When the sliding rod 0451 slides out, the reset spring 0453 is compressed. After the sliding rod 0451 is squeezed out, the reset spring 0453 is used to reset the sliding rod 0451, causing the clamping jaws 045 to retract, preparing for the next rotation of the rotating outer tube 042 and preventing interference between the sliding rod 0451 and the mounting bracket 041 as the sliding rod 0451 rotates with it.

[0067] Preferably, the clamping jaws 045 include a plurality of clamping jaw groups distributed in a circular array on the rotating outer tube 042, and each clamping jaw group includes at least two vertically arranged clamping jaws 045. By arranging multiple clamping jaws 045 in the vertically arranged clamping jaw group together to suck the extension rod, the stability after suction is increased.

[0068] Preferably, the jaws are provided with four, and the rotation angle between two adjacent jaws is 90 degrees. The rotating outer tube 042 rotates in the same direction, clockwise or counterclockwise, and a jaw 045 is extended every 90 degrees. Each jaw 045 can be installed with an extension rod or a drill rod.

[0069] Preferably, the first driving mechanism includes a driving motor and an outer ring gear arranged on the rotating outer tube 042. A driving gear is provided on the motor shaft of the driving motor, and the driving gear is engaged with the outer ring gear. An angle sensor engaged with the driving gear is also provided on the mounting seat plate 044. The rotation angle of the driving gear is obtained by the angle sensor and used to control the rotation angle of the rotating outer tube 042.

[0070] Preferably, the upper connecting structure is a step structure, the outer side wall of the step structure is provided with an external thread, and the lower connecting structure is a sleeve structure, the inner side wall of the sleeve structure is provided with an internal thread that matches the external thread. The rotary drive assembly is lifted and lowered to press the drill rod or extension rod down to dock and connect them by rotation.

[0071] Preferably, the bottom of the mounting plate 044 is provided with a retaining seat 046, which has several conical heads 047 at its base and retaining frames 048 on its sides. Retaining frames 048 have a retaining opening with a limiter. The drill rod and extension rod are positioned within the retaining opening, and their inclination angles are maintained within a set range by the retaining opening. The conical heads 047 are used to penetrate the ground for increased stability. The retaining opening is a semicircular recess. Example

[0072] This embodiment mainly describes the title of the walking down-the-hole drill, which is as follows:

[0073] This embodiment provides a walking down-the-hole drill. Figures 1-10 , which includes a walking support mechanism, a turning mechanism 03 is provided on the walking support mechanism, and the turning mechanism 03 includes:

[0074] The swing frame 031 is rotatably mounted on the walking support mechanism;

[0075] A first articulated frame 032, which is hinged to the swing frame 031;

[0076] The flip seat 036 is hinged to the end of the first hinge frame 032;

[0077] The first telescopic cylinder 035 has two ends hinged to the walking support mechanism and the first articulated frame 032 respectively, and is used to drive the first articulated frame 032 to swing;

[0078] The second telescopic cylinder 033 has two ends respectively hinged on the swing frame 031 and the first articulated frame 032 for driving the first articulated frame 032 to rotate up and down. The second telescopic cylinder 033 is located above the first articulated frame 032.

[0079] The third telescopic cylinder 034 has two ends hinged to the first articulated frame 032 and the turning seat 036 respectively, and is used to drive the turning seat 036 to turn up and down. The third telescopic cylinder 034 is located below the first articulated frame 032;

[0080] The rotating disk 037 has two relatively rotatable connecting ends, one of which is fixed to the flip seat 036 and has two symmetrical fourth telescopic cylinders 038 hinged on both sides of the connecting end;

[0081] A fixed frame 039, one side of which is fixed to the other connecting end of the rotating disk 037, is hingedly connected to the output end of the fourth telescopic cylinder 038 so as to be driven by the two fourth telescopic cylinders 038 to rotate around the rotating disk 037. The other side of the fixed frame 039 is fixed to the aforementioned modular drill assembly 04, wherein the mounting frame 041 of the modular drill assembly 04 is detachably connected to the fixed frame 039;

[0082] With the walking portion of the walking support mechanism being in a horizontal state as a reference, the swing frame 031 rotates in the horizontal direction, and the first articulated frame 032 and the turnover seat 036 rotate in the vertical direction.

[0083] Preferably, the walking support mechanism includes a body 01 and a crawler-type walking mechanism 02 for driving the body 01 to walk, and the body 01 is provided with a plurality of vertically retractable hydraulic support legs 011. Example

[0084] On the basis of Example 1, a dust removal and noise reduction structure is further provided at the bottom of the retaining frame 048, such as Figure 11-16 As shown, the dust removal and noise reduction structure 03 includes a mounting post 04811 mounted at the bottom of a retaining frame 048. A first cover 0032 and a second cover 0031 are rotatably mounted on mounting post 04811. The movable ends of the first and second covers 0032 and 0031 are provided with locking structures, and when locked, they form an outer cylinder 0038. The outer cylinder 0038 has an inner bottom, where a number of nozzles 0035 for spraying water are located. By providing two retractable covers, one for mounting a drill rod when opened and one for forming a single cover when closed, the covers themselves provide a certain degree of noise reduction, which, combined with the dust removal provided by the nozzles 0035, provides a certain degree of dust removal and noise reduction capabilities for the drilling rig.

[0085] Preferably, the first cover body 0032 and the second cover body 0031 each include a semicircular inner top plate 0033 and a cover plate provided on the arc-shaped outer edge of the inner top plate 0033. The cover plate is used to cover the drilling position of the drill bit to prevent excessive noise and dust from escaping.

[0086] As a preferred embodiment, an arc-shaped slide rail is provided on the inner bottom, and a plurality of nozzles 0035 are slidably provided in the slide rail. When in use, the position of the nozzle 0035 can be slidably adjusted according to the situation.

[0087] Preferably, the slide rail is an arc-shaped hole 0034 provided on the inner top plate 0033. The nozzle 0035 is provided with an external thread and is threadedly connected to two locking nuts 0036. The locking nuts 0036 are located on both sides of the inner top plate 0033 and can clamp the inner top plate 0033 to fix the nozzle 0035. After adjusting the position of the nozzle 0035, it is locked with the locking nuts 0036.

[0088] Preferably, a vertically extending arc-shaped plate 00371 is provided at the arc-shaped inner edge of the two inner top plates 0033. After the first cover 0032 and the second cover 0031 are locked, the two arc-shaped plates 00371 form an inner cylinder 0037. The drill rod is located inside the inner cylinder.

[0089] Preferably, the top portion of the outer cylinder 0038 is a cylindrical structure and the bottom portion is a trumpet-shaped structure with a gradually increasing opening.

[0090] Preferably, the movable ends of the first cover body 0032 and the second cover body 0031 are provided with two abuttable mounting plates 0039, and the mounting plates 0039 are provided with locking holes, and fastening bolts are passed through the locking holes and fixed by nuts.

[0091] Preferably, a first hinged ear 00321 with a circular hole is provided on the side wall of the first cover body 0032, and two second hinged ears 00311 with circular holes are provided on the side wall of the second cover body 0031. The first hinged ear 00321 is arranged in the gap between the two second hinged ears 00311 and the three hinged ears are coaxially arranged, wherein the diameter of each circular hole is the same as the diameter of the mounting column 04811, and a limit head is provided at the bottom of the mounting column 04811 to prevent each hinged ear from falling off.

[0092] Preferably, after the first cover body 0032 and the second cover body 0031 are installed on the mounting column 04811, a distance is left between the top of the two and the bottom surface of the retaining seat, and the distance is used for the top end of the nozzle 0035 to extend.

[0093] Preferably, a cavity is provided within retainer 048. One side of the cavity is provided with a water inlet channel, and the other side of the cavity is provided with a plurality of water outlet connectors 04812. Water outlet connectors 04812 are connected to the top of nozzle 0035 via hoses. The diameter of the water inlet channel is much larger than that of the water outlet connectors 04812. During use, water is pumped into the cavity and then delivered to different nozzles 0035 through different water outlet connectors 04812 for spraying.

[0094] The above is a detailed introduction to the titles provided by the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the present invention and its core ideas. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, the present invention can also be improved and modified. These improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. Modular drill bit assembly, characterized in that, include: A drill rod, the bottom end of which is provided with a cutter head, and the top end of which is provided with an upper connecting structure; The extension rod has a lower connecting structure at its bottom end and an upper connecting structure at its top end, and the lower connecting structure and the upper connecting structure are detachably connected; The mounting frame has a U-shaped mounting opening, and the top and bottom of the mounting opening are provided with mounting seat plates, and one or both sides of the mounting opening are provided with a lifting rack; A lifting trolley is slidably disposed at the end of the mounting opening of the mounting frame, and includes a lifting gear meshing with the rack and a lifting motor driving the lifting gear to rotate; A rotating outer tube is rotatably mounted on two mounting base plates and is located within the mounting opening. The mounting base plates are provided with a first driving mechanism that drives the rotating outer tube to rotate. an eccentric column fixed to the mounting base plate and located inside the rotating outer tube and having a vertically extending protrusion, with the rotating outer tube being rotatable relative to the eccentric column; The clamping jaws slide horizontally through and are resettably mounted on the rotating outer tube. The clamping jaws have a U-shaped electromagnetic jaw with a clamping opening. The width of the clamping opening of the electromagnetic jaws is the same as the diameter of the drill rod and the extension rod. When energized, the electromagnetic jaws can absorb the drill rod or the extension rod at the clamping opening. When the electromagnetic jaws rotate with the rotating outer tube, the inner ends of the electromagnetic jaws are squeezed by the raised portions and slide outward, thereby ejecting the absorbed drill rod or extension rod to the docking position. The rotary drive assembly is arranged on the lifting trolley, and an upper connecting structure is provided at its output end. When the drill rod or extension rod is extended, it follows the lifting trolley to descend and sleeve the drill rod or extension rod for docking; the clamp includes a non-circular sliding rod and an electromagnetic claw arranged at the outer end of the sliding rod. The inner end of the sliding rod has a limit head to prevent it from falling off the rotating outer tube. A support frame is provided on the outer wall of the rotating outer tube, and the sliding rod slides through the support frame. A reset structure for retracting and restoring the sliding rod is provided on the support frame and the sliding rod.

2. The modular drill head assembly according to claim 1, wherein: The reset structure includes a limit platform set on the sliding rod and a reset spring sleeved on the sliding rod. One end of the reset spring rests on the limit platform, and the other end of the reset spring rests on the mounting bracket. When the sliding rod slides out, the reset spring is compressed.

3. The modular drill head assembly according to claim 1, wherein: The clamping jaws include a plurality of clamping jaw groups distributed on the rotating outer tube in a circular array, and each clamping jaw group includes at least two clamping jaws arranged vertically.

4. The modular drill head assembly according to claim 3, wherein: There are four clamping jaws, and the rotation angle between two adjacent ones is 90 degrees.

5. The modular drill head assembly according to claim 4, wherein: The first driving mechanism includes a driving motor and an outer gear ring arranged on the rotating outer tube. A driving gear is provided on the motor shaft of the driving motor, and the driving gear is engaged with the outer gear ring. An angle sensor engaged with the driving gear is also provided on the mounting base plate. The rotation angle of the driving gear is obtained by the angle sensor and used to control the rotation angle of the rotating outer tube.

6. The modular drill head assembly according to claim 1, wherein: The upper connecting structure is a step structure, and the outer wall of the step structure is provided with an external thread. The lower connecting structure is a sleeve structure, and the inner wall of the sleeve structure is provided with an internal thread that matches the external thread. The rotary drive assembly is lifted and lowered to press the drill rod or extension rod down to dock and connect through rotation.

7. The modular drill head assembly according to claim 1, wherein: A retaining seat is provided at the bottom of the mounting base plate, which has several conical heads at the bottom and a retaining frame at the side. The retaining frame is provided with a retaining mouth with a limiting opening. The drill rod and the extension rod are located in the retaining mouth and their inclination angles are kept within the set range by limiting the retaining mouth.

8. A walking down-the-hole drill, comprising a walking support mechanism, characterized in that: The walking support mechanism is provided with a turning mechanism, which includes: A swing frame, which is rotatably mounted on the walking support mechanism; a first articulated frame, which is hinged to the swing frame; a flip seat hinged to an end of the first hinged frame; A first telescopic cylinder, with both ends hinged to the walking support mechanism and the first articulated frame respectively, for driving the first articulated frame to swing; The second telescopic cylinder has two ends hinged to the swing frame and the first articulated frame respectively for driving the first articulated frame to rotate up and down; The third telescopic cylinder has two ends hinged to the first hinge frame and the turning seat respectively, and is used to drive the turning seat to turn up and down; The rotating disc has two disc bodies that can rotate relative to each other, one of which is fixed on the turning seat and has two symmetrical fourth telescopic cylinders hinged on both sides of the disc body; a fixed frame, one side of which is fixed to the other disc body of the rotating disc, which is hinged to the output end of the fourth telescopic cylinder so as to be driven by the two fourth telescopic cylinders to rotate around the rotating disc, and the other side of which is fixed to the modular drill bit assembly according to any one of claims 1 to 7, wherein the mounting frame of the modular drill bit assembly is detachably connected to the fixed frame; Taking the walking part of the walking support mechanism being in a horizontal state as a reference, the swing frame rotates in the horizontal direction, and the first articulated frame and the turnover seat rotate in the vertical direction.

9. The walking down-the-hole drill according to claim 8, characterized in that: The walking support mechanism comprises a machine body and a crawler-type walking mechanism for driving the machine body to walk. The machine body is provided with a plurality of vertically retractable hydraulic support legs.

Images